Trim 4k dashcam

The following can be used to crop the details off the bottom of a 4K Blackvue dashcam and resize it back to 4K (3840×2160)

ffmpeg 
-nostdin 
-loglevel verbose 
-i $1 \
-c:a aac \
-vbr 5 \
-c:v libx264 \
-crf 20 \
-coder 1 \
-context 1 \
-g 1 \
-threads 8 \
-vf 'crop=3726:2096:57:0,scale=3840:2160' \
-r 30000/1001 \
$2